Shipping Motorhome to the USA and Canada

Hi, we are thinking of temporarily shipping our motorhome to North America for an extended holiday. 

I have 2 questions that I hope somebody can answer. 

1. We have been investigating motorhome insurance and it's a minefield. Has anybody insured a UK registered vehicle in North America? If so who with, and have you got any contact details that you could pass on?

2. Secondly, connecting a UK van to mains electric in the US/Canada, what do you need to enable this to happen safely, transformers, cables? 

Thanks in advance

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